Changing The Bacnet Ms/Tp Data Transmission Rate; Figure 6. Microtech Iii Chiller Unit Controller Password Menu And Main Features - McQuay MicroTech III Installation And Maintenance Manual

8. Navigate back to the BACnet MSTP Setup menu (see steps 1-4) to verify the settings of all

Figure 6. MicroTech III Chiller Unit Controller Password Menu and Main Features

Changing the BACnet MS/TP Data Transmission Rate

The BACnet Communication Module is set with a factory default baud rate of 38400 bps.
Additional baud rate options (in bps) include: 9600, 19200, 38400, and 76800. The following
section describes how to change the BACnet MS/TP data transmission rate via the keypad display.
1. If you have not already entered a password, select Enter Password from the Main Menu screen
2. Enter Password: 5321 and then press Enter.
3. Scroll down to View/Set Unit (i.e. turn the knob clockwise) and press Enter.
4. Scroll down to BACnet MSTP Setup and press Enter.
5. Change the Baud Rate by scrolling to Baud Rate and press Enter to selected desired baud rate
6. Scroll to ApplyMSTPChgs and set to Yes. This will save the changes and cycle power to the
12
parameters. This procedure may take a minute while the BACnet Communication Module
powers up.
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment has exposed electrical connections inside BACnet Communication Module.
Only personnel that are knowledgeable in the operation of this equipment must perform
connections and service to the BACnet Communication Module.
(i.e. turn the circular knob on the unit controller until the cursor is in the proper location) and
press Enter (i.e. press down on the knob). See Figure 6.
a. If you are not at the Main Menu and need to enter a password, press the Back button from
any other menu screen until you reach the Main Menu and follow step 1. See Figure 6 for
the location of the Back button.
b. If you have already entered a password, skip to step 3. See Figure 6 if you are not certain
whether or not a password has been entered.
(see Figure 7 to view a baud rate that has been changed to 76800 bps).
unit controller (see Figure 8).
Back button Circular knob (press
down to Enter value)
WARNING
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IM 967-1